Bit-gage for cutter-heads



No. 625,707. Patented May 23, I899.

. s. J. smman.

BIT GAGE FOR CUTTER HEADS.

(Application filed Mar. 20, 1899.)

(No Model.)

'9 WITNESSES: INVENTOH" WM M xfmwd JAM; v BM UNITED STATES PATENT -OEFIcE.

sAMUEL J. SHIMER, on MILTON, PENNSYLVANIA.

I BIT GAGE FOR CUTTER-HEADS.

SPECIFICATION forming part of Letters Patent No. 625,707, dated May 23, 1899.

I Application file March 20, 1899. Serial No. 709,845. (No model.)

To all whom it may concern: I

Be it known that I, SAMUEL J. SHIMER, a citizen of the United States, residing at Milton, in the county of Northumberland and State of Pennsylvania, have invented new and useful Improvements in Bit-Gages for Cutter-Heads, of which the following is a specification.

My invention relates to gages for setting the bits of rotary-stock cutter-heads for woodworking-machines, which heads are provided with alternately-arranged bit-seats in opposite sides or faces of the same.

The object of the invention is to provide an improved construction of gage which can be securely connected with the head, so that the operator can have the use of both hands in adjusting the bits, and in which the bits can be mechanically and accurately adjusted or set irrespective of the efficiency or skill of the workman or operator.

The invention consists in the novel construct-ion and combination of parts hereinafter fully described and claimed.

In the accompanying drawings, Figure l is a perspective view of a cutter-head provided with a gage constructed in accordance with my invention. Fig. 2 is a similar view showing the gage removed from the head. Fig. 3 is a central longitudinal section of the gage.

. Fig. 4 is a bottom plan view of the same. Fig.

5 is a view of one of the nuts for holding the bits in place. i

In the said drawings the reference-numeral 1 designates a cutter-head of any ordinary or suitable construction, being shown in the present instance as what is known as an expanding head, comprising in its structure two sections 2 and 3, provided with flanges 4,

having formed in opposite sides or faces alternately-arranged bit-seats 5. These sections are movable with respect to each other, so as to be capable of being expanded and contracted, as is well known to those familiar with the art to which the invention pertains.

The numeral 6 designates the gage, comprising a metal plate 7, flat or plane surfaced on one face and on the opposite side formed with a central boss provided with an enlargement 9. The said boss is formed with a bore or opening extending longitudinally theretegral with the plate 7 is a guide-arm 13,which is inclined with respect to the plate at an angle corresponding with the angular cutting edges of the bits. This arm determines the position the bits occupy when secured to their seats. Formed in one face of the plate 7 is a rectangular groove or slot 14, in which works a cross-head 15, provided with aboss 16,which is slidable in the opening 12 and is provided with two oppositely-extending rods 17. Seat ed in the bore or opening 10 and passing through the boss 16 is a slidable rod 18, one end of which is enlarged and works in the enlarged end of said bore or opening. The numeral 19 designates a screw-plug fitting in the enlarged end of said bore or opening, and interposed between the same and the end of said rod is a coiled spring 20, the said ro-d be ing enlarged, so as to allow a spring of comparatively large diameter to be used in connection therewith. The said cross-head and the plate 7 are formed with curved recesses 21, and the object of the spring is to force the said cross-head toward the recesses in the plate. i

The numeral 23 designates one of the bits, and 24 the nut which holds the bolt by which the bit is secured to its seat.

In using the device the cross-head is moved away from the recesses 21 in the plate 7, and one of the recesses in said cross-head and plate is engaged with the cylindrical portion of the nut 24. The cross-head is now released, when it and the plate will be clamped to the nut under spring-pressure, and the guidearm 13 will be inclined at the proper angle or the angle corresponding to the angle of inclination of the bit. By now adjusting the bit so that the cutting edge will abut against the guide-arm the proper position of the bit will be determined. The nuts are then screwed home, so as to securely hold the bits in place on their seats.

From the above it'will be seen that mechanical means are provided for setting the bits, and they are not, therefore, subjectto the skill or aptness of the workman, as is the case in gages which are held to the head by hand.

The rods 17 serve as handles for operating the cross-head in securing it to and removing it from the nut.

Having thus fully described my invention, What I claim is- 1. As an improved article a gage for setting the bits of rotary-stock cutter-heads, comprising the plate formed with a curved recess and an inclined arm, and the springactuated cross-head formed with a recess adjacent to the recess in said plate, substantially as described.

2. In a gage for setting the bits of rotarystock cutter-heads, the combination with the plate formed with a curved recess and an in-v clined arm, of the slidable rod Working in a longitudinal bore or opening in said plate and the coiled spring, substantially as described.

3. In a gage for setting the bits of rotarystock cutter-heads, the combination with the plate formed with a boss having a longitudinal opening, and said plate formed with a curved recess and an inclined arm, of the slidable cross-head having a curved recess, the slidable rod connected with said crosshead, the coiled spring and screw-plug, substantially as described.

4. Ina gage for setting the bits of rotarystock cutter-heads, the combination with the plate formed with a boss having a longitudinal bore or opening with an intersecting transverse opening and said plate formed with a curved recess and an inclined arm, of

v the slidable cross-head having a curved re- SAMUEL J. SHIMER.

Witnesses:

W. H. BECK, O. F. BALLIET. 

